The EDC Soot Model

The Soot model used in KFX® is according to the EDC soot model by Magnussen. The soot formation model is based on the work by Tesner on soot formation in acetylene flames, which is generalized to handle different types of hydro carbons.

The soot formation model is based on the assumption that soot nucleus are spontaneously formated in fuel rich high temperature regions.  The number of soot nucleus will then grow due to branching on already existing nucleus.  As the level of soot increase, the nucleus will be terminated on soot particles.  The soot particle will accordingly grow due to collapse of nucleus on the soot particles.  In addition a soot termination term is added that increase with the amount of soot present.

The EDC soot model use the same type of formulation for the mean reaction rate for nucleus and soot as The Eddy Dissipation Concept (EDC) Combustion model.  The soot and nucleus formation is however assumed to take place both in the burning fine structures and the surrounding of these structures.

The soot volume fraction is an important parameter in the formulation of the absorption coefficient in smokey regions.

 

kfx log in

News

NewsMore news